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Topçu S, Tekçe N, Kopuz D, Özcelik EY, Kolaylı F, Tuncer S, Demirci M. Effect of surface roughness and biofilm formation on the color properties of resin-infiltrated ceramic and lithium disilicate glass-ceramic CAD-CAM materials. J Prosthet Dent 2024; 131:935.e1-935.e8. [PMID: 38431509 DOI: 10.1016/j.prosdent.2024.02.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2023] [Revised: 02/06/2024] [Accepted: 02/09/2024] [Indexed: 03/05/2024]
Abstract
STATEMENT OF PROBLEM Computer-aided design and computer-aided manufacturing (CAD-CAM) materials have become popular for dental restorations; however, which materials should be preferred in terms of surface properties after biofilm formation is unclear. PURPOSE The purpose of this in vitro study was to investigate the effect of biofilm formation on the discoloration properties of resin-infiltrated ceramic and glass-ceramic CAD-CAM materials and human teeth and to examine the effect of the brushing procedure on color change. MATERIAL AND METHODS One hundred and six 2-mm-thick specimens were prepared from IPS e.max CAD and Cerasmart, and a total of 53 intact human teeth were used. Five specimens from each group were used to measure the amount of live biomass in the biofilm. The remaining 48 specimens in each group were divided into 4 subgroups: kept in distilled water without the formation of dental biofilm (DW), kept in tea without the formation of dental biofilm (T), kept in distilled water after the formation of dental biofilm (DWB), and kept in tea after the formation of dental biofilm (TB) (n=12). After finishing and polishing the materials, initial color measurements were made using a spectrophotometer, and surface roughness measurements were made using noncontact profilometer. After creating a biofilm layer in DWB and TB, all specimens were kept in their solutions at 37 °C for 24 hours, and the color measurements were repeated. After the biofilm layer had been removed by brushing, a third color measurement was made. The data were statistically analyzed with one-way analysis of variance (ANOVA) and two-way ANOVA (α=.05). RESULTS The lowest roughness value was observed in Cerasmart. Tooth-IPS e.max CAD gave similar results. The Cerasmart material had the most viable biomass, whereas the IPS e.max CAD material had the least. TB had the highest ΔE1 value for all materials and DW had the lowest (P<.05). The brushing procedure caused the materials to return to their initial colors or reduce the color change in most groups. CONCLUSIONS The presence of biofilm on CAD-CAM materials immersed in distilled water caused an unacceptable degree of discoloration (ΔE>1.8), and immersion in tea led to greater color change. The adhesion of biofilm to restorative dental materials plays an important role in the coloring of these dental materials.
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Affiliation(s)
- Sümeyra Topçu
- Research Assistant, Department of Restorative Dentistry, Kocaeli University, Kocaeli, Turkey
| | - Neslihan Tekçe
- Professor, Department of Restorative Dentistry, Kocaeli University, Kocaeli, Turkey
| | - Dilan Kopuz
- Assistant Professor, Department of Restorative Dentistry, Istanbul Kent University, Istanbul, Turkey.
| | - Eda Yazıcı Özcelik
- Research Assistant, Department of Microbiology and Clinical Microbiology, Kocaeli University, Kocaeli, Turkey
| | - Fetiye Kolaylı
- Professor, Department of Microbiology and Clinical Microbiology, Kocaeli University, Kocaeli, Turkey
| | - Safa Tuncer
- Professor, Department of Restorative Dentistry, Istanbul University, Istanbul, Turkey
| | - Mustafa Demirci
- Professor, Department of Restorative Dentistry, Istanbul University, Istanbul, Turkey
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Tzimas K, Rahiotis C, Pappa E. Biofilm Formation on Hybrid, Resin-Based CAD/CAM Materials for Indirect Restorations: A Comprehensive Review. MATERIALS (BASEL, SWITZERLAND) 2024; 17:1474. [PMID: 38611989 PMCID: PMC11012497 DOI: 10.3390/ma17071474] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2024] [Revised: 03/14/2024] [Accepted: 03/21/2024] [Indexed: 04/14/2024]
Abstract
Hybrid materials are a recent addition in the field of restorative dentistry for computer-aided design/computer-aided manufacturing (CAD/CAM) indirect restorations. The long-term clinical success of modern dental restorative materials is influenced by multiple factors. Among the characteristics affecting the longevity of a restoration, the mechanical properties and physicοchemical interactions are of utmost importance. While numerous researchers constantly evaluate mechanical properties, the biological background of resin-based CAD/CAM biomaterials is scarcely investigated and, therefore, less described in the literature. This review aims to analyze biofilm formation on the surfaces of novel, hybrid, resin-based CAD/CAM materials and evaluate the methodological protocols followed to assess microbial growth. It is demonstrated that the surface structure, the composition and the finishing and polishing procedures on the surface of a dental restorative material influence initial bacterial adhesion; however, most studies focus on in vitro protocols, and in vivo and/or in situ research of microbiomics in CAD/CAM restorative materials is lacking, obstructing an accurate understanding of the bioadhesion phenomenon in the oral cavity.
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Affiliation(s)
| | - Christos Rahiotis
- Department of Operative Dentistry, National and Kapodistrian University of Athens, 11527 Athens, Greece; (K.T.); (E.P.)
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Yang Y, Ding H, Han A, Bai X, Bijle MN, Matinlinna JP, Tsoi JKH. Porphyromonas gingivalis can degrade dental zirconia. Dent Mater 2023; 39:1105-1112. [PMID: 37839996 DOI: 10.1016/j.dental.2023.10.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2022] [Revised: 08/30/2023] [Accepted: 10/05/2023] [Indexed: 10/17/2023]
Abstract
OBJECTIVES The aim of present study was to examine the effect of Porphyromonas gingivalis (P.g.) adhesion on dental zirconia by characterizing the physical and chemical properties. METHODS Eighty polished-sintered zirconia discs were prepared and randomly distributed to 5 groups (n = 16): Zirconia cultured with - Group 1: broth containing P.g. for - 3 days; Group 2: 7 days; Group 3: broth (alone) for - 3 days; Group 4: 7 days; and Group 5: dry discs (negative control). After experimental period, broths were analyzed for pH and Zr release with inductively coupled plasma-optical emission spectroscopy (ICP-OES). The zirconia surface was evaluated by scanning electron microscope (SEM), atomic force microscopy (AFM), X-ray diffraction (XRD), water contact angle (WCA), and biaxial flexural strength (BFS). RESULTS The mean pH with zirconia adhesion to P.g. group was significantly higher than the broth control (p < 0.05). As per ICP-OES, Zr ion/particulate release with P.g. adhesion to zirconia were significantly higher than the controls (p < 0.05). Post-experimental incubation, no defects were found on zirconia surfaces; tetragonal phase remained constant with no transformation to monoclinic phase but lower peak intensities were identified in experimental groups. WCA of zirconia surfaces with P.g. bacteria for 3 days (12.04° ± 2.05°) and 7 days (15.09° ± 2.95°) were significantly higher than zirconia surfaces immersed with broth (only) for 3 days (7.17° ± 1.09°) and 7 days (7.55° ± 0.65°), respectively (p < 0.05). BFS values of zirconia with P.g. for 3 days (632.57 ± 119.96 MPa) and 7 days (656.17 ± 100.29 MPa) were significantly lower than zirconia incubated in broth alone (765.01 ± 20.12 MPa) conditions (p < 0.05). SIGNIFICANCE Under the conditions of present study, it can be concluded that P.g. adhesion on zirconia leads to structural alterations of dental zirconia further contributing to zirconia degradation.
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Affiliation(s)
- Yunzhen Yang
- Dental Materials Science, Division of Applied Oral Sciences and Community Dental Care, Faculty of Dentistry, The University of Hong Kong, Hong Kong SAR, P. R. China
| | - Hao Ding
- Dental Materials Science, Division of Applied Oral Sciences and Community Dental Care, Faculty of Dentistry, The University of Hong Kong, Hong Kong SAR, P. R. China
| | - Aifang Han
- Dental Materials Science, Division of Applied Oral Sciences and Community Dental Care, Faculty of Dentistry, The University of Hong Kong, Hong Kong SAR, P. R. China
| | - Xuedong Bai
- Dental Materials Science, Division of Applied Oral Sciences and Community Dental Care, Faculty of Dentistry, The University of Hong Kong, Hong Kong SAR, P. R. China
| | - Mohammed Nadeem Bijle
- Paediatric Dentistry, Faculty of Dentistry, The University of Hong Kong, Hong Kong SAR, P. R. China
| | - Jukka Pekka Matinlinna
- Dental Materials Science, Division of Applied Oral Sciences and Community Dental Care, Faculty of Dentistry, The University of Hong Kong, Hong Kong SAR, P. R. China; Division of Dentistry, School of Medical Sciences, The University of Manchester, Manchester, United Kingdom
| | - James Kit-Hon Tsoi
- Dental Materials Science, Division of Applied Oral Sciences and Community Dental Care, Faculty of Dentistry, The University of Hong Kong, Hong Kong SAR, P. R. China.
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Zhang S, Liu F, He J. Enhanced anti-bacterial adhesion effect of FDMA/SR833s based dental resin composites by using 1H,1H-heptafluorobutyl methacrylate as partial diluent. Biomater Investig Dent 2023; 10:2281090. [PMID: 38979097 PMCID: PMC11229670 DOI: 10.1080/26415275.2023.2281090] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2023] [Accepted: 11/04/2023] [Indexed: 07/10/2024] Open
Abstract
With the purpose of further reducing surface free energy to achieve better anti-bacterial adhesion effect of fluorinated dimethacrylate (FDMA)/tricyclo (5.2.1.0) decanedimethanol diacrylate (SR833s) based dental resin composites (DS), 1H,1H-heptafluorobutyl methacrylate (FBMA) was used to partially replace SR933s as reactive diluent. According to the degree of substitution, the obtained resin composites were marked as DSF-1 (20 wt.% of SR833s was replaced by FBMA), DSF-2 (40 wt.% of SR833s was replaced by FBMA), and DSF-3 (60 wt.% of SR833s was replaced by FBMA). Bisphenol A glycidyl dimethacrylate (Bis-GMA)/triethylene glycol dimethacrylate (TEGDMA) based resin composite (BT) was used as control. The influence of FBMA concentration on double bond conversion (DC), contact angle, surface free energy, anti-bacterial adhesion effect against Streptococcus mutans (S. mutans), volumetric shrinkage (VS) and shrinkage stress (SS), flexural strength (FS) and modulus (FM), water sorption (WS) and solubility (SL) were investigated. The results showed that FBMA addition could reduce surface free energy from 44.6 mN/m for DS to 32.9 mN/m for DSF-3, and lead to better anti-bacterial adhesion effect (the amounts of adherent bacteria decreased from 2.03 × 105 CFU/mm2 for DS to 6.44 × 104 CFU/mm2 for DSF-3). The FBMA had no negative effects on DC, VS, SS, WS, and SL. Too high a concentration of FBMA reduced FS and FM before water immersion, but the values were still higher than those of BT.
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Affiliation(s)
- Shengcan Zhang
- College of Materials Science and Engineering, South China University of Technology, China
| | - Fang Liu
- College of Materials Science and Engineering, South China University of Technology, China
| | - Jingwei He
- College of Materials Science and Engineering, South China University of Technology, China
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Daabash R, Alqahtani MQ, Price RB, Alshabib A, Niazy A, Alshaafi MM. Surface Properties and Streptococcus mutans Biofilm Adhesion of Ion-Releasing Resin-Based Composite Materials. J Dent 2023; 134:104549. [PMID: 37196686 DOI: 10.1016/j.jdent.2023.104549] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2023] [Revised: 05/11/2023] [Accepted: 05/15/2023] [Indexed: 05/19/2023] Open
Abstract
OBJECTIVE To evaluate the adhesion of Streptococcus mutans (S. mutans) and related surface properties of ion-releasing resin-based composite (RBC) restorative materials. METHODS Two ion-releasing RBCs, Activa (ACT) and Cention-N (CN), were compared to a conventional RBC (Z350) and a resin-modified glass ionomer cement (Fuji-II-LC). Ten disk-shaped specimens were fabricated for each material (n=40). After standardized surface polishing procedure, the surface properties of the specimens were evaluated using surface roughness measurements by a profilometer and hydrophobicity using water contact angle measurements. To assess bacterial adhesion, the number of S. mutans bacteria was calculated from colony-forming units (CFU). Confocal laser scanning microscope analysis was done for qualitative & quantitative assessment. The data were analyzed using One-way ANOVA followed by Tukey's post-hoc test to compare the mean values of surface roughness, water contact angle and CFU values. To compare the mean dead cell percentage Kruskal-Wallis rank test and Conover test were used. A p-value of ≤ 0.05 was used to report the statistical significance. RESULTS Z350 and ACT had the smoothest surfaces, followed by CN, and the roughest surface was seen in FUJI-II-LC. The lowest water contact angles were seen in CN, and Z350, and the highest were in ACT. S. mutans counts were the highest in ACT and the lowest in Z350 and CN. CN and Fuji-II-LC registered the highest percentage of dead bacterial cells, while the lowest were in ACT. SIGNIFICANCE Surface properties did not significantly influence bacterial adhesion. More S. mutans bacteria accumulated on ACT than on the nanofilled composite and on CN. CN had antibacterial effects against Streptococcus mutans biofilms.
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Affiliation(s)
- Rawan Daabash
- Department of Restorative Dentistry, College of Dentistry, King Saud University, Riyadh, Saudi Arabia.
| | - Mohammed Q Alqahtani
- Department of Restorative Dentistry, College of Dentistry, King Saud University, Riyadh, Saudi Arabia
| | - Richard Bengt Price
- Department of Dental Clinical Sciences, Dalhousie University, Faculty of Dentistry, Halifax, Nova Scotia, Canada
| | - Abdulrahman Alshabib
- Department of Restorative Dentistry, College of Dentistry, King Saud University, Riyadh, Saudi Arabia
| | - Abdurahman Niazy
- Department of Oral Medicine and Diagnostic Sciences, College of Dentistry, King Saud University, Riyadh, Saudi Arabia
| | - Maan M Alshaafi
- Department of Restorative Dentistry, College of Dentistry, King Saud University, Riyadh, Saudi Arabia
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Sandmair MN, Kleber C, Ströbele DA, von See C. AFM Analysis of a Three-Point Flexure Tested, 3D Printing Definitive Restoration Material for Dentistry. J Funct Biomater 2023; 14:jfb14030152. [PMID: 36976076 PMCID: PMC10056548 DOI: 10.3390/jfb14030152] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2023] [Revised: 02/28/2023] [Accepted: 03/07/2023] [Indexed: 03/12/2023] Open
Abstract
Background: Three-dimensional printing is a rapidly developing technology across all industries. In medicine recent developments include 3D bioprinting, personalized medication and custom prosthetics and implants. To ensure safety and long-term usability in a clinical setting, it is essential to understand material specific properties. This study aims to analyze possible surface changes of a commercially available and approved DLP 3D printed definitive restoration material for dentistry after three-point flexure testing. Furthermore, this study explores whether Atomic Force Microscopy (AFM) is a feasible method for examination of 3D printed dental materials in general. This is a pilot study, as there are currently no studies that analyze 3D printed dental materials using an AFM. Methods: The present study consisted of a pretest followed by the main test. The resulting break force of the preliminary test was used to determine the force used in the main test. The main test consisted of atomic force microscopy (AFM) surface analysis of the test specimen followed by a three-point flexure procedure. After bending, the same specimen was analyzed with the AFM again, to observe possible surface changes. Results: The mean root mean square (RMS) roughness of the segments with the most stress was 20.27 nm (±5.16) before bending, while it was 26.48 nm (±6.67) afterward. The corresponding mean roughness (Ra) values were 16.05 nm (±4.25) and 21.19 nm (±5.71) Conclusions: Under three-point flexure testing, the surface roughness increased significantly. The p-value for RMS roughness was p = 0.003, while it was p = 0.006 for Ra. Furthermore, this study showed that AFM surface analysis is a suitable procedure to investigate surface changes in 3D printed dental materials.
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Affiliation(s)
- Maximilian N. Sandmair
- Research Center for Digital Technologies in Dentistry and CAD/CAM, Department of Dentistry, Faculty of Medicine and Dentistry, Danube Private University, 3500 Krems, Austria
- Correspondence: (M.N.S.); (C.v.S.)
| | - Christoph Kleber
- Department of Medicine, Faculty of Medicine and Dentistry, Danube Private University, 3500 Krems, Austria
| | - Dragan A. Ströbele
- Research Center for Digital Technologies in Dentistry and CAD/CAM, Department of Dentistry, Faculty of Medicine and Dentistry, Danube Private University, 3500 Krems, Austria
| | - Constantin von See
- Research Center for Digital Technologies in Dentistry and CAD/CAM, Department of Dentistry, Faculty of Medicine and Dentistry, Danube Private University, 3500 Krems, Austria
- Correspondence: (M.N.S.); (C.v.S.)
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He J, Lassila L, Garoushi S, Vallittu P. Tailoring the monomers to overcome the shortcomings of current dental resin composites - review. Biomater Investig Dent 2023; 10:2191621. [PMID: 37090482 PMCID: PMC10120559 DOI: 10.1080/26415275.2023.2191621] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/25/2023] Open
Abstract
Dental resin composites (DRCs) have become the first choice among different restorative materials for direct anterior and posterior restorations in the clinic. Though the properties of DRCs have been improved greatly in recent years, they still have several shortcomings, such as volumetric shrinkage and shrinkage stress, biofilm development, lack of radio-opacity for some specific DRCs, and estrogenicity, which need to be overcome. The resin matrix, composed of different monomers, constitutes the continuous phase and determine the performance of DRCs. Thus, the chemical structure of the monomers plays an important role in modifying the properties of DRCs. Numerous researchers have taken to design and develop novel monomers with specific functions for the purpose of fulfilling the needs in dentistry. In this review, the development of monomers in DRCs were highlighted, especially focusing on strategies aimed at reducing volumetric shrinkage and shrinkage stress, endowing bacteriocidal and antibacterial adhesion activities as well as protein-repelling activity, increasing radio-opacity, and replacing Bis-GMA. The influences of these novel monomers on the properties of DRCs were also discussed.
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Affiliation(s)
- Jingwei He
- College of Materials Science and Engineering, South China University of Technology, Guangzhou, China
- Department of Biomaterials Science and Turku Clinical Biomaterials Center-TCBC, Institute of Dentistry, University of Turku, Turku, Finland
- CONTACT Jingwei He College of Materials Science and Engineering, South China University of Technology, Guangzhou, China
| | - Lippo Lassila
- Department of Biomaterials Science and Turku Clinical Biomaterials Center-TCBC, Institute of Dentistry, University of Turku, Turku, Finland
| | - Sufyan Garoushi
- Department of Biomaterials Science and Turku Clinical Biomaterials Center-TCBC, Institute of Dentistry, University of Turku, Turku, Finland
| | - Pekka Vallittu
- Department of Biomaterials Science and Turku Clinical Biomaterials Center-TCBC, Institute of Dentistry, University of Turku, Turku, Finland
- Wellbeing Services County of South-West Finland, Turku, Finland
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Novel Dental Restorative Solutions for Natural Teeth and Implants. BIOENGINEERING (BASEL, SWITZERLAND) 2022; 9:bioengineering9120772. [PMID: 36550979 PMCID: PMC9774112 DOI: 10.3390/bioengineering9120772] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Accepted: 12/02/2022] [Indexed: 12/12/2022]
Abstract
The long-term survival of restorations in the oral cavity has always been one of the most significant challenges in modern dental practice [...].
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D’Ercole S, De Angelis F, Biferi V, Noviello C, Tripodi D, Di Lodovico S, Cellini L, D’Arcangelo C. Antibacterial and Antibiofilm Properties of Three Resin-Based Dental Composites against Streptococcus mutans. MATERIALS 2022; 15:ma15051891. [PMID: 35269121 PMCID: PMC8911767 DOI: 10.3390/ma15051891] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/01/2022] [Revised: 02/23/2022] [Accepted: 02/28/2022] [Indexed: 12/28/2022]
Abstract
Antibacterial and antibiofilm properties of restorative dental materials may improve restorative treatment outcomes. The aim of this in vitro study was to evaluate Streptococcus mutans capability to adhere and form biofilm on the surface of three commercially available composite resins (CRs) with different chemical compositions: GrandioSO (VOCO), Venus Diamond (VD), and Clearfil Majesty (ES-2). Disk-shaped specimens were manufactured by light-curing the CRs through two glass slides to maintain a perfectly standardized surface topography. Specimens were subjected to Planktonic OD600nm, Planktonic CFU count, Planktonic MTT, Planktonic live/dead, Adherent Bacteria CFU count, Biomass Quantification OD570nm, Adherent Bacteria MTT, Concanavalin A, and Scanning Electron Microscope analysis. In presence of VOCO, VD, and ES2, both Planktonic CFU count and Planktonic OD600nm were significantly reduced compared to that of control. The amount of Adherent CFUs, biofilm Biomass, metabolic activity, and extracellular polymeric substances were significantly reduced in VOCO, compared to those of ES2 and VD. Results demonstrated that in presence of the same surface properties, chemical composition might significantly influence the in vitro bacterial adhesion/proliferation on resin composites. Additional studies seem necessary to confirm the present results.
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Affiliation(s)
- Simonetta D’Ercole
- Department of Medical, Oral and Biotechnological Sciences, “G. d’Annunzio” University of Chieti–Pescara, 66100 Chieti, Italy; (S.D.); (V.B.); (C.N.); (D.T.); (C.D.)
| | - Francesco De Angelis
- Department of Medical, Oral and Biotechnological Sciences, “G. d’Annunzio” University of Chieti–Pescara, 66100 Chieti, Italy; (S.D.); (V.B.); (C.N.); (D.T.); (C.D.)
- Correspondence: ; Tel.: +39-(0)85-4549652
| | - Virginia Biferi
- Department of Medical, Oral and Biotechnological Sciences, “G. d’Annunzio” University of Chieti–Pescara, 66100 Chieti, Italy; (S.D.); (V.B.); (C.N.); (D.T.); (C.D.)
| | - Chiara Noviello
- Department of Medical, Oral and Biotechnological Sciences, “G. d’Annunzio” University of Chieti–Pescara, 66100 Chieti, Italy; (S.D.); (V.B.); (C.N.); (D.T.); (C.D.)
| | - Domenico Tripodi
- Department of Medical, Oral and Biotechnological Sciences, “G. d’Annunzio” University of Chieti–Pescara, 66100 Chieti, Italy; (S.D.); (V.B.); (C.N.); (D.T.); (C.D.)
| | - Silvia Di Lodovico
- Department of Pharmacy, “G. d’Annunzio” University of Chieti–Pescara, 66100 Chieti, Italy; (S.D.L.); (L.C.)
| | - Luigina Cellini
- Department of Pharmacy, “G. d’Annunzio” University of Chieti–Pescara, 66100 Chieti, Italy; (S.D.L.); (L.C.)
| | - Camillo D’Arcangelo
- Department of Medical, Oral and Biotechnological Sciences, “G. d’Annunzio” University of Chieti–Pescara, 66100 Chieti, Italy; (S.D.); (V.B.); (C.N.); (D.T.); (C.D.)
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Establishment of novel in vitro culture system with the ability to reproduce oral biofilm formation on dental materials. Sci Rep 2021; 11:21188. [PMID: 34707212 PMCID: PMC8551238 DOI: 10.1038/s41598-021-00803-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2021] [Accepted: 10/11/2021] [Indexed: 11/15/2022] Open
Abstract
Intensive research has been conducted with the aim of developing dental restorative/prosthetic materials with antibacterial and anti-biofilm effects that contribute to controlling bacterial infection in the oral cavity. In situ evaluations were performed to assess the clinical efficacy of these materials by exposing them to oral environments. However, it is difficult to recruit many participants to collect sufficient amount of data for scientific analysis. This study aimed to assemble an original flow-cell type bioreactor equipped with two flow routes and assess its usefulness by evaluating the ability to reproduce in situ oral biofilms formed on restorative materials. A drop of bacterial suspension collected from human saliva and 0.2% sucrose solution was introduced into the assembled bioreactor while maintaining the incubation conditions. The bioreactor was able to mimic the number of bacterial cells, live/dead bacterial volume, and volume fraction of live bacteria in the in situ oral biofilm formed on the surface of restorative materials. The usefulness of the established culture system was further validated by a clear demonstration of the anti-biofilm effects of a glass-ionomer cement incorporating zinc-releasing glasses when evaluated by this system.
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Dental Biofilm and Saliva Microbiome and Its Interplay with Pediatric Allergies. Microorganisms 2021; 9:microorganisms9061330. [PMID: 34207425 PMCID: PMC8235788 DOI: 10.3390/microorganisms9061330] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2021] [Revised: 06/07/2021] [Accepted: 06/15/2021] [Indexed: 12/17/2022] Open
Abstract
Little is known about the interplay and contribution of oral microorganisms to allergic diseases, especially in children. The aim of the clinical study was to associate saliva and dental biofilm microbiome with allergic disease, in particular with allergic asthma. In a single-center study, allergic/asthmatic children (n = 15; AA-Chd; age 10.7 ± 2.9), atopic/allergic children (n = 16; AT/AL-Chd; 11.3 ± 2.9), and healthy controls (n = 15; CON-Chd; age 9.9 ± 2.2) were recruited. After removing adhering biofilms from teeth and collecting saliva, microbiome was analyzed by using a 16s-rRNA gene-based next-generation sequencing in these two mediums. Microbiome structure differed significantly between saliva and dental biofilms (β-diversity). Within the groups, the dental biofilm microbiome of AA-Chd and AT/AL-Chd showed a similar microbial fingerprint characterized by only a small number of taxa that were enriched or depleted (4) compared to the CON-Chd, while both diseased groups showed a stronger microbial shift compared to CON-Chd, revealing 14 taxa in AA-Chd and 15 taxa in AT/AL-Chd that were different. This could be the first note to the contribution of dental biofilm and its metabolic activity to allergic health or disease.
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Laumbacher H, Strasser T, Knüttel H, Rosentritt M. Long-term clinical performance and complications of zirconia-based tooth- and implant-supported fixed prosthodontic restorations: A summary of systematic reviews. J Dent 2021; 111:103723. [PMID: 34119611 DOI: 10.1016/j.jdent.2021.103723] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2021] [Revised: 05/21/2021] [Accepted: 06/02/2021] [Indexed: 01/08/2023] Open
Abstract
OBJECTIVES To present an overview on systematic reviews on prosthodontic zirconia restorations and to discuss long-term complications as well as information on anatomical and functional changes to the masticatory system. DATA/SOURCES MEDLINE, EMBASE, Trip medical, and Cochrane Library databases were searched for systematic reviews up to February 2021. Bias was assessed and clinical survival and complications were analyzed. STUDY SELECTION 38 eligible articles published between 2006 and 2021 were included. The reviews were based on 128 in vivo studies on approximately 10,000 zirconia restorations. 5-year cumulative survival rates varied between 91.2% and 95.9% for tooth-supported (TS) single crowns (SC), 89.4% and 100% for TS multi-unit fixed dental prostheses (FDP), 97.1% and 97.6% for implant-supported (IS) SCs and 93.0% and 100% for IS FDPs. Chipping was the most often technical complication, followed by framework fracture, loss of retention, marginal discrepancies/discoloration, occlusal roughness and abutment/screw loosening. Color mismatch was the only esthetic complication. Biological complications were caries, endodontic complications, tooth fracture, periodontal disease, abrasion/attrition, persisting pain, high sensitivity, peri‑implantitis and soft tissue issues. Patients with bruxism were only examined sporadically. CONCLUSIONS 5-year results for zirconia restorations were satisfactory. The predominant technical problem of veneering fractures could be overcome with adapted design or fabrication and application of monolithic restorations, but reviews of clinical studies on this subject are rare. The impact of zirconia restorations on the masticatory system remains unclear. CLINICAL SIGNIFICANCE Zirconia restorations are experiencing a rapidly increasing use in dental practice. Being highly wear-resistant, hard and durable, it can be assumed that they do not follow natural abrasion and changes in the masticatory system. Possible long-term effects on the stomatognathic system as a whole should therefore be considered.
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Affiliation(s)
- Harald Laumbacher
- Department of Prosthetic Dentistry, UKR University Hospital Regensburg, 93042 Regensburg, Germany
| | - Thomas Strasser
- Department of Prosthetic Dentistry, UKR University Hospital Regensburg, 93042 Regensburg, Germany
| | - Helge Knüttel
- University Library, University of Regensburg, 93042 Regensburg, Germany
| | - Martin Rosentritt
- Department of Prosthetic Dentistry, UKR University Hospital Regensburg, 93042 Regensburg, Germany.
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Liber-Kneć A, Łagan S. Surface Testing of Dental Biomaterials-Determination of Contact Angle and Surface Free Energy. MATERIALS 2021; 14:ma14112716. [PMID: 34064111 PMCID: PMC8196709 DOI: 10.3390/ma14112716] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Revised: 05/06/2021] [Accepted: 05/19/2021] [Indexed: 11/16/2022]
Abstract
The key goal of this study was to characterize surface properties of chosen dental materials on the base on the contact angle measurements and surface free energy calculations. Tested materials were incubated in the simulated oral environment and drinks to estimate an influence of conditions similar to those in the oral cavity on wetting and energetic state of the surface. Types of materials were as follows: denture acrylic resins, composite and PET-G dental retainer to compare basic materials used in a prosthetics, restorative dentistry and orthodontics. The sessile drop method was used to measure the contact angle with the use of several liquids. Values of the surface free energies were estimated based on the Owens-Wendt, van Oss-Chaudhury-Good and Zisman's methods. The research showed that surface wetting depends on the material composition and storage conditions. The most significance changes of CA were observed for acrylic resins (84.7° ± 3.8° to 65.5° ± 3.5°) and composites (58.8° ± 4.1° to 49.1° ± 5.7°) stored in orange juice, and for retainers (81.9° ± 1.8° to 99.6° ± 4.5°) incubated in the saline solution. An analysis of the critical surface energy showed that acrylic materials are in the zone of good adhesion (values above 40 mJ/m2), while BIS-GMA composites are in the zone of poor adhesion (values below 30 mJ/m2). Study of the surface energy of different dental materials may contribute to the development of the thermodynamic model of bacterial adhesion, based on the surface free energies, and accelerate the investigation of biomaterial interaction in the biological environment.
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Mittal R, Tan KS, Wong ML, Allen PF. Correlation between microbial host factors and caries among older adults. BMC Oral Health 2021; 21:47. [PMID: 33541321 PMCID: PMC7863314 DOI: 10.1186/s12903-021-01408-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2020] [Accepted: 01/24/2021] [Indexed: 12/02/2022] Open
Abstract
Background There is little knowledge about factors which may affect oral health among older adults. The objective of this study was to determine the relationship between Streptococcus mutans (MS) and Lactobacilli (LB) counts and caries among older adults. Methods In this community-based observation study, 141 participants aged 60 years and above were recruited from the west district of Singapore. Alongside the clinical examination, saliva samples were collected to determine Streptococcus mutans (MS) and Lactobacilli (LB) counts, as well as to record salivary flow rate and buffering capacity of saliva. Results Of the 141 participants, 63.8% were female and 94.3% were of Chinese ethnicity. The mean DMFT was 11.08 (s.d. 8.27). 9.9% of participants had at least one decayed tooth, 52.5% had minimum one missing tooth and 86.5% had at least one filled tooth. 67.4% had MS counts of ≥ 105 while LB counts were ≥ 105 for 48.2%. 83.7% had normal salivary flow or hypersalivation (> = 1 mL/min), the buffering capacity of the saliva was alkaline in 61% of the participants. Multivariate analysis showed that participants who had high MS counts were less likely to have a DMFT < 12 [OR (95% CI), 0.29 (0.11–0.77)] whereas participants who had high LB counts were less likely to have a DMFT ≤ 14 [OR (95% CI), 0.45 (0.20–1.002)]. Conclusion Our study showed a positive correlation between MS and LB counts and caries experience in older adults. The mean DMFT was on the low side in our sample despite having a relatively high MS count. This suggests that there are many other factors which vary according to host environment, physiological and biological conditions that may affect MS and LB counts in the oral cavity. Clinical relevance Our study supports the knowledge that the aetiology of dental caries among older adults is a complex process and it would be wrong to consider caries as a same problem with the same solution for all age groups.
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Affiliation(s)
- Rakhi Mittal
- Faculty of Dentistry, National University of Singapore, Singapore, Singapore.
| | - Kai Soo Tan
- Faculty of Dentistry, National University of Singapore, Singapore, Singapore
| | - Mun Loke Wong
- Faculty of Dentistry, National University of Singapore, Singapore, Singapore
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15
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Tong H, Yu X, Shi Z, Liu F, Yu Y, Deng F, He J. Physicochemical properties, bond strength and dual-species biofilm inhibition effect of dental resin composites with branched silicone methacrylate. J Mech Behav Biomed Mater 2021; 116:104368. [PMID: 33545416 DOI: 10.1016/j.jmbbm.2021.104368] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Revised: 01/21/2021] [Accepted: 01/25/2021] [Indexed: 10/22/2022]
Abstract
Dental resin composites (DRCs) with 15 wt% (EC-15%) and 20 wt% (EC-20%) synthesized branched silicone methacrylate (BSM) in resin matrix have showed anti-adhesion effect against Streptococcus mutans. With the aim to evaluate the BSM containing DRCs further, water sorption (WS), solubility (SL), mechanical properties before and after water immersion, anti-adhesion effect against dual-species, bonding strength to adhesive treated dentin, and cytotoxicity of BSM containing DRCs were investigated. DRC without BSM was used as control. The WS and SL were obtained until the mass variation of composite in distilled water kept stable. Three-point bending test was used to evaluate flexural strength (FS) and modulus (FM) of composite before and after water immersion. Mixture of Streptococcus mutans and Lactobacillus acidophilus was used to study the anti-adhesion effect against dual-species. Bonding strength of composite to adhesive treated dentin was measured through macro-shear test. Extract of composite was used to evaluate its cytotoxicity effect on L-929 mouse fibroblasts, and cell viability was obtained by MTT assay. The results showed that EC-15% and EC-20% had similar WS and SL as control (p < 0.05); After water immersion, FS and FM of all composites decreased (p < 0.05), but there was no significant difference in value of FS and FM between different groups (p > 0.05); More bacteria were recovered from the surface of control than those from the surface of EC-15% and EC-20% (p < 0.05); Extract of EC-15% was less cytotoxic (higher cell viability) than those EC-20% and control (p < 0.05). All of results revealed that incorporation of 15 wt% or 20 wt% BSM in resin matrix could endow DRC with inhibition effect on dual-species biofilm formation without impairing physiochemical properties, bonding strength to adhesive treated dentin, and cytotoxicity of DRC.
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Affiliation(s)
- Hui Tong
- College of Materials Science and Engineering, South China University of Technology, Guangzhou, PR China
| | - Xiaolin Yu
- Department of Oral Implantology, Hospital of Stomatology, Guanghua School of Stomatology, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Stomatology, Guangzhou, PR China
| | - Zhifeng Shi
- College of Materials Science and Engineering, South China University of Technology, Guangzhou, PR China; National Engineering Research Center for Tissue Restoration and Reconstruction, South China University of Technology, Guangzhou, PR China
| | - Fang Liu
- College of Materials Science and Engineering, South China University of Technology, Guangzhou, PR China
| | - Yi Yu
- Department of Oral Implantology, Hospital of Stomatology, Guanghua School of Stomatology, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Stomatology, Guangzhou, PR China
| | - Feilong Deng
- Department of Oral Implantology, Hospital of Stomatology, Guanghua School of Stomatology, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Stomatology, Guangzhou, PR China.
| | - Jingwei He
- College of Materials Science and Engineering, South China University of Technology, Guangzhou, PR China.
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16
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Ali S, Sangi L, Kumar N, Kumar B, Khurshid Z, Zafar MS. Evaluating antibacterial and surface mechanical properties of chitosan modified dental resin composites. Technol Health Care 2021; 28:165-173. [PMID: 31594266 DOI: 10.3233/thc-181568] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
BACKGROUND The antibacterial properties are beneficial and desired for dental restorative composite materials. The incorporation of various antimicrobial agents into resin composites may compromise their physical and mechanical properties hence limiting their applications. OBJECTIVE The aim of the current study is to evaluate the antibacterial activity and the hardness of microhybrid and flowable resin based composites (RBCs) modified using novel antimicrobial agent chitosan (CS). METHODS The antibacterial activity of microhybrid and flowable RBCs modified with 0, 0.25, 0.5 and 1% w/w chitosan (CS) against Actinomyces viscous bacteria was explored using agar diffusion test and direct contact methods. The hardness of control and experimental RBCs was determined by Vickers hardness (VH) tester. RESULTS The results revealed that control and experimental flowable and microhybrid RBCs did not demonstrate growth inhibition zone in the lawn growth of Actinomyces viscous. The direct contact test revealed that colony forming unit (CFU) count of Actinomyces viscous was comparable among the experimental and control materials. The flowable RBCs containing 1% CS had significantly higher VH compared to control and other experimental flowable RBC groups. The microhybrid RBCs consisting of 0.50% CS exhibited significantly higher VH compared to experimental microhybrid RBC group containing 1% CS.
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Affiliation(s)
- Shahid Ali
- Department of Science of Dental Materials, Bibi Aseefa Dental College, Shaheed Mohtarma Benazir Bhutto Medical University, Larkana, Pakistan
| | - Laila Sangi
- Department of Operative Dentistry, Institute of Dentistry, Liaquat University of Medical and Health Sciences, Jamshoro, Pakistan
| | - Naresh Kumar
- Department of Science of Dental Materials, Dow International Dental College, Dow University of Health Sciences, Karachi, Pakistan
| | - Bharat Kumar
- Department of Prosthodontics, Dow International Dental College, Dow University of Health Sciences, Karachi, Pakistan
| | - Zohaib Khurshid
- Department of Prosthodontics and Dental Biomaterials, College of Dentistry, King Faisal University, Al-Ahsa, Saudi Arabia
| | - Muhammad S Zafar
- Department of Restorative Dentistry, College of Dentistry, Taibah University, Madinah Al Munawwarah, Saudi Arabia.,Department of Dental Material, RIPHAH International University, Islamabad, Pakistan
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17
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Haghi H, Peeri-Dogaheh H, Fazlalizadeh S, Abazari M, Mohammadhosseini R. Effect of Streptococcus mutans on the flexural strength of resin-based restorative materials. Dent Res J (Isfahan) 2021. [DOI: 10.4103/1735-3327.328758] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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18
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Does the Addition of Zinc Oxide Nanoparticles Improve the Antibacterial Properties of Direct Dental Composite Resins? A Systematic Review. MATERIALS 2020; 14:ma14010040. [PMID: 33374229 PMCID: PMC7795203 DOI: 10.3390/ma14010040] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/28/2020] [Revised: 12/09/2020] [Accepted: 12/21/2020] [Indexed: 11/23/2022]
Abstract
A promising approach to improve the poor antibacterial properties of dental composite resins has been the addition of metal oxide nanoparticles into the resin matrix. This systematic review aimed to determine whether the addition of zinc oxide nanoparticles (ZnO-NPs) improves the antibacterial properties of direct dental composite resins. This review was conducted in accordance with the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines and registered with the PROSPERO database: CRD42019131383. A systematic literature search was conducted using the following databases: Medline (Ovid), the Cochrane Library, SCOPUS, CINAHL, Web of Science, Trove, Google Scholar, World Cat, and OpenGrey. The initial search retrieved 3178 results, which were then screened against inclusion and exclusion criteria, resulting in a total of four studies that were eligible for qualitative synthesis within this review. All the included studies were in vitro non-randomized post-test design experimental studies. A lack of congruity in the results obtained from these studies that used different tests to evaluate antibacterial activity was evident. Although some studies demonstrated a significant improvement of antibacterial properties in composites containing at least 1% ZnO-NPs (wt %), they are unlikely to present any clear clinical advantage due to the short lifetime of observed antibacterial properties.
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Mulder R, Maboza E, Ahmed R. Streptococcus mutans Growth and Resultant Material Surface Roughness on Modified Glass Ionomers. FRONTIERS IN ORAL HEALTH 2020; 1:613384. [PMID: 35047988 PMCID: PMC8757809 DOI: 10.3389/froh.2020.613384] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2020] [Accepted: 10/19/2020] [Indexed: 12/02/2022] Open
Abstract
The present study investigate the optical density of Streptococcus mutans (S. mutans) at 450 nm (OD450 nm) as well as the change in surface roughness of three commercially available chitosan- and nanodiamond-modified glass ionomers. The results indicated that the optical density of S. mutans OD450 nm decreased significantly (p < 0.0001) from 0 h through 2–4 h for each of the control materials. The lowest S. mutans OD450 nm was noted for Fuji IX followed by Ketac Universal. Riva Self Cure had the largest increase in the S. mutans OD450 nm. The control materials and their chitosan/nanodiamond modifications showed significant growth at 6 h compare to the preceding time periods of 2 and 4 h. The materials Fuji IX, Fuji IX modified with 5% Nanodiamonds, Fuji IX modified with 10% Chitosan and Ketac Universal modified with 10% Chitosan performed the best with regard to the bacterial reduction. Only the chitosan modifications showed an increase in the surface roughness after 24 h of exposure to the S. mutans. The chitosan and the nanodiamond modifications provided the best disruption of the S. mutans biofilm formation.
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Affiliation(s)
- Riaan Mulder
- Restorative Dentistry, The University of the Western Cape, Cape Town, South Africa
- *Correspondence: Riaan Mulder
| | - Ernest Maboza
- Dental Research Laboratory, The University of the Western Cape, Cape Town, South Africa
| | - Rukshana Ahmed
- Restorative Dentistry, The University of the Western Cape, Cape Town, South Africa
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20
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Sterzenbach T, Helbig R, Hannig C, Hannig M. Bioadhesion in the oral cavity and approaches for biofilm management by surface modifications. Clin Oral Investig 2020; 24:4237-4260. [PMID: 33111157 PMCID: PMC7666681 DOI: 10.1007/s00784-020-03646-1] [Citation(s) in RCA: 69] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2020] [Accepted: 10/15/2020] [Indexed: 12/19/2022]
Abstract
BACKGROUND All soft and solid surface structures in the oral cavity are covered by the acquired pellicle followed by bacterial colonization. This applies for natural structures as well as for restorative or prosthetic materials; the adherent bacterial biofilm is associated among others with the development of caries, periodontal diseases, peri-implantitis, or denture-associated stomatitis. Accordingly, there is a considerable demand for novel materials and coatings that limit and modulate bacterial attachment and/or propagation of microorganisms. OBJECTIVES AND FINDINGS The present paper depicts the current knowledge on the impact of different physicochemical surface characteristics on bioadsorption in the oral cavity. Furthermore, it was carved out which strategies were developed in dental research and general surface science to inhibit bacterial colonization and to delay biofilm formation by low-fouling or "easy-to-clean" surfaces. These include the modulation of physicochemical properties such as periodic topographies, roughness, surface free energy, or hardness. In recent years, a large emphasis was laid on micro- and nanostructured surfaces and on liquid repellent superhydrophic as well as superhydrophilic interfaces. Materials incorporating mobile or bound nanoparticles promoting bacteriostatic or bacteriotoxic properties were also used. Recently, chemically textured interfaces gained increasing interest and could represent promising solutions for innovative antibioadhesion interfaces. Due to the unique conditions in the oral cavity, mainly in vivo or in situ studies were considered in the review. CONCLUSION Despite many promising approaches for modulation of biofilm formation in the oral cavity, the ubiquitous phenomenon of bioadsorption and adhesion pellicle formation in the challenging oral milieu masks surface properties and therewith hampers low-fouling strategies. CLINICAL RELEVANCE Improved dental materials and surface coatings with easy-to-clean properties have the potential to improve oral health, but extensive and systematic research is required in this field to develop biocompatible and effective substances.
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Affiliation(s)
- Torsten Sterzenbach
- Clinic of Operative and Pediatric Dentistry, Medical Faculty Carl Gustav Carus, Technische Universität Dresden, Fetscherstraße 74, 01307, Dresden, Germany.
| | - Ralf Helbig
- Max Bergmann Center of Biomaterials, Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Straße 6, 01069, Dresden, Germany
| | - Christian Hannig
- Clinic of Operative and Pediatric Dentistry, Medical Faculty Carl Gustav Carus, Technische Universität Dresden, Fetscherstraße 74, 01307, Dresden, Germany
| | - Matthias Hannig
- Clinic of Operative Dentistry, Periodontology and Preventive Dentistry, University Hospital, Saarland University, Building 73, 66421, Homburg/Saar, Germany
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21
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Abdalla MM, Ali IA, Khan K, Mattheos N, Murbay S, Matinlinna JP, Neelakantan P. The Influence of Surface Roughening and Polishing on Microbial Biofilm Development on Different Ceramic Materials. J Prosthodont 2020; 30:447-453. [DOI: 10.1111/jopr.13260] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/10/2020] [Indexed: 01/08/2023] Open
Affiliation(s)
- Mohamed Mahmoud Abdalla
- Faculty of Dentistry The University of Hong Kong Hong Kong SAR
- Dental Biomaterials Department, Faculty of Dental Medicine Al‐Azhar University Cairo Egypt
| | - Islam A.A. Ali
- Faculty of Dentistry The University of Hong Kong Hong Kong SAR
| | - Khadija Khan
- Faculty of Dentistry The University of Hong Kong Hong Kong SAR
| | - Nikos Mattheos
- Department of Dental Medicine Karolinska Institutet Stockholm Sweden
- Chulalongkorn University Thailand
| | - Sukhdeep Murbay
- Faculty of Dentistry The University of Hong Kong Hong Kong SAR
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22
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Jain A, Armstrong SR, Banas JA, Qian F, Maia RR, Teixeira EC. Dental adhesive microtensile bond strength following a biofilm-based in vitro aging model. J Appl Oral Sci 2020; 28:e20190737. [PMID: 32609185 PMCID: PMC7340208 DOI: 10.1590/1678-7757-2019-0737] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2019] [Accepted: 05/11/2020] [Indexed: 11/22/2022] Open
Abstract
OBJECTIVE Laboratory tests are routinely used to test bonding properties of dental adhesives. Various aging methods that simulate the oral environment are used to complement these tests for assessment of adhesive bond durability. However, most of these methods challenge hydrolytic and mechanical stability of the adhesive- enamel/dentin interface, and not the biostability of dental adhesives. To compare resin-dentin microtensile bond strength (μTBS) after a 15-day Streptococcus mutans (SM) or Streptococcus sobrinus (SS) bacterial exposure to the 6-month water storage (WS) ISO 11405 type 3 test. METHODOLOGY A total of 31 molars were flattened and their exposed dentin was restored with Optibond-FL adhesive system and Z-100 dental composite. Each restored molar was sectioned and trimmed into four dumbbell-shaped specimens, and randomly distributed based on the following aging conditions: A) 6 months of WS (n=31), B) 5.5 months of WS + 15 days of a SM-biofilm challenge (n=31), C) 15 days of a SM-biofilm challenge (n=31) and D) 15 days of a SS-biofilm challenge (n=31). μTBS were determined and the failure modes were classified using light microscopy. RESULTS Statistical analyses showed that each type of aging condition affected μTBS (p<0.0001). For Group A (49.7±15.5MPa), the mean μTBS was significantly greater than in Groups B (19.3±6.3MPa), C (19.9±5.9MPa) and D (23.6±7.9MPa). For Group D, the mean μTBS was also significantly greater than for Groups B and C, but no difference was observed between Groups B and C. CONCLUSION A Streptococcus mutans- or Streptococcus sobrinus-based biofilm challenge for 15 days resulted in a significantly lower μTBS than did the ISO 11405 recommended 6 months of water storage. This type of biofilm-based aging model seems to be a practical method for testing biostability of resin-dentin bonding.
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Affiliation(s)
- Aditi Jain
- University of Iowa, Department of Operative Dentistry, Iowa City, IA, USA
| | - Steve R Armstrong
- University of Iowa, Department of Operative Dentistry, Iowa City, IA, USA
| | - Jeffrey A Banas
- University of Iowa, Iowa Institute for Oral Health Research, Iowa City, IA, USA
| | - Fang Qian
- University of Iowa, Iowa Institute for Oral Health Research, Iowa City, IA, USA
| | - Rodrigo R Maia
- University of Iowa, Department of Operative Dentistry, Iowa City, IA, USA
| | - Erica C Teixeira
- University of Iowa, Department of Operative Dentistry, Iowa City, IA, USA
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23
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Engel AS, Kranz HT, Schneider M, Tietze JP, Piwowarcyk A, Kuzius T, Arnold W, Naumova EA. Biofilm formation on different dental restorative materials in the oral cavity. BMC Oral Health 2020; 20:162. [PMID: 32493365 PMCID: PMC7268681 DOI: 10.1186/s12903-020-01147-x] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2020] [Accepted: 05/21/2020] [Indexed: 01/05/2023] Open
Abstract
Background Bacterial biofilms adhere to all tissues and surfaces in the oral cavity. Oral biofilms are responsible for the decay of human dental structures and the inflammatory degeneration of the alveolar bone. Moreover, oral biofilms on artificial materials influence the lifespan of dental prostheses and restoratives. Methods To investigate in vivo oral biofilm formation and growth, five different dental restorative materials were analyzed and compared to human enamel. The roughness of the materials and the human enamel control probe were measured at the start of the study. The dental restorative materials and the human enamel control probe were placed in dental splints and worn for 3 h, 24 h and 72 h. Results Scanning electron microscopy (SEM) revealed major differences between oral biofilm formation and growth on the materials compared to those on human enamel. Microbiological analyses showed that bacterial strains differed between the materials. Significant differences were observed in the roughness of the dental materials. Conclusions It can be concluded that material roughness affects biofilm formation on dental surfaces and restoratives, but other factors, such as surface charge, surface energy and material composition, may also have an influence.
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Affiliation(s)
- Alexander-Simon Engel
- Department of Biological and Material Sciences in Dentistry, Faculty of Health, Witten/Herdecke University, Alfred Herrhausenstrasse 44, 58455, Witten, Germany
| | - Hagen Tizian Kranz
- Department of Biological and Material Sciences in Dentistry, Faculty of Health, Witten/Herdecke University, Alfred Herrhausenstrasse 44, 58455, Witten, Germany
| | - Marvin Schneider
- Department of Biological and Material Sciences in Dentistry, Faculty of Health, Witten/Herdecke University, Alfred Herrhausenstrasse 44, 58455, Witten, Germany
| | - Jan Peter Tietze
- Department of Biological and Material Sciences in Dentistry, Faculty of Health, Witten/Herdecke University, Alfred Herrhausenstrasse 44, 58455, Witten, Germany
| | - Andree Piwowarcyk
- Department of Prosthodontics and Dental Technology, Faculty of Health, Witten/Herdecke University, Alfred Herrhausenstrasse 44, 58455, Witten, Germany
| | - Thorsten Kuzius
- Institute for Hygiene, Faculty of Medicine, Westfälische Wilhelms-Universität Muenster, Robert Koch Strasse 41, 48149, Muenster, Germany
| | - Wolfgang Arnold
- Department of Biological and Material Sciences in Dentistry, Faculty of Health, Witten/Herdecke University, Alfred Herrhausenstrasse 44, 58455, Witten, Germany.
| | - Ella A Naumova
- Department of Biological and Material Sciences in Dentistry, Faculty of Health, Witten/Herdecke University, Alfred Herrhausenstrasse 44, 58455, Witten, Germany
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24
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Afonso Camargo SE, Mohiuddeen AS, Fares C, Partain JL, Carey PH, Ren F, Hsu SM, Clark AE, Esquivel-Upshaw JF. Anti-Bacterial Properties and Biocompatibility of Novel SiC Coating for Dental Ceramic. J Funct Biomater 2020; 11:jfb11020033. [PMID: 32443691 PMCID: PMC7353563 DOI: 10.3390/jfb11020033] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2020] [Revised: 05/05/2020] [Accepted: 05/09/2020] [Indexed: 11/16/2022] Open
Abstract
A 200 nm plasma-enhanced chemical vapor-deposited SiC was used as a coating on dental ceramics to improve anti-bacterial properties for the applications of dental prosthesis. A thin SiO2 (20 nm) in the same system was deposited first, prior to SiC deposition, to improve the adhesion between SiC to dental ceramic. Silane and methane were the precursors for SiC deposition, and the SiO2 deposition employed silane and nitrous oxide as the precursors. SiC antimicrobial activity was evaluated on the proliferation of biofilm, Streptococcus sanguinis, and Streptococcus mutans on SiC-coated and uncoated dental ceramics for 24 h. The ceramic coating with SiC exhibited a biofilm coverage of 16.9%, whereas uncoated samples demonstrated a significantly higher biofilm coverage of 91.8%, measured with fluorescence and scanning electron microscopic images. The cytotoxicity of the SiC coating was evaluated using human periodontal ligament fibroblasts (HPdLF) by CellTiter-BlueCell viability assay. After 24 h of HPdLF cultivation, no obvious cytotoxicity was observed on the SiC coating and control group; both sets of samples exhibited similar cell adhesion and proliferation. SiC coating on a ceramic demonstrated antimicrobial activity without inducing cytotoxic effects.
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Affiliation(s)
- Samira Esteves Afonso Camargo
- Department of Restorative Dental Sciences, Division of Prosthodontics, University of Florida College of Dentistry, Gainesville, FL 32610, USA; (S.E.A.C.); (A.S.M.); (S.-M.H.); (A.E.C.)
| | - Azeem S. Mohiuddeen
- Department of Restorative Dental Sciences, Division of Prosthodontics, University of Florida College of Dentistry, Gainesville, FL 32610, USA; (S.E.A.C.); (A.S.M.); (S.-M.H.); (A.E.C.)
| | - Chaker Fares
- Department of Chemical Engineering, University of Florida Herbert Wertheim College of Engineering, Gainesville, FL 32611, USA; (C.F.); (J.L.P.); (P.H.C.IV); (F.R.)
| | - Jessica L. Partain
- Department of Chemical Engineering, University of Florida Herbert Wertheim College of Engineering, Gainesville, FL 32611, USA; (C.F.); (J.L.P.); (P.H.C.IV); (F.R.)
| | - Patrick H. Carey
- Department of Chemical Engineering, University of Florida Herbert Wertheim College of Engineering, Gainesville, FL 32611, USA; (C.F.); (J.L.P.); (P.H.C.IV); (F.R.)
| | - Fan Ren
- Department of Chemical Engineering, University of Florida Herbert Wertheim College of Engineering, Gainesville, FL 32611, USA; (C.F.); (J.L.P.); (P.H.C.IV); (F.R.)
| | - Shu-Min Hsu
- Department of Restorative Dental Sciences, Division of Prosthodontics, University of Florida College of Dentistry, Gainesville, FL 32610, USA; (S.E.A.C.); (A.S.M.); (S.-M.H.); (A.E.C.)
| | - Arthur E. Clark
- Department of Restorative Dental Sciences, Division of Prosthodontics, University of Florida College of Dentistry, Gainesville, FL 32610, USA; (S.E.A.C.); (A.S.M.); (S.-M.H.); (A.E.C.)
| | - Josephine F. Esquivel-Upshaw
- Department of Restorative Dental Sciences, Division of Prosthodontics, University of Florida College of Dentistry, Gainesville, FL 32610, USA; (S.E.A.C.); (A.S.M.); (S.-M.H.); (A.E.C.)
- Correspondence:
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Resin composite blocks for dental CAD/CAM applications reduce biofilm formation in vitro. Dent Mater 2020; 36:603-616. [DOI: 10.1016/j.dental.2020.03.016] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2019] [Revised: 02/18/2020] [Accepted: 03/12/2020] [Indexed: 11/23/2022]
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Zupancic Cepic L, Dvorak G, Piehslinger E, Georgopoulos A. In vitro adherence of Candida albicans to zirconia surfaces. Oral Dis 2020; 26:1072-1080. [PMID: 32125751 DOI: 10.1111/odi.13319] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2019] [Revised: 01/17/2020] [Accepted: 02/23/2020] [Indexed: 01/26/2023]
Abstract
OBJECTIVES This study aimed to characterize surface properties such as roughness (Ra) and surface-free energy (SFE) of glazed and polished yttria-stabilized zirconia and to evaluate in vitro adherence of fungus Candida albicans and salivary bacteria, Staphylococcus epidermidis, mixed with C. albicans to these substrata. Additionally, the influence of salivary proteins (albumin, mucin and α-amylase) on yeast adhesion was studied. MATERIAL AND METHODS Ra and SFE of glazed and polished zirconia discs were measured. Specimens were wetted with saliva and salivary proteins prior to incubation with C. albicans and mixed suspension of C. albicans and S. epidermidis for 24 hr, respectively. Microbial adhesion was quantified by counting colony-forming units (CFU). Differences in physicochemical properties were proved by t test. "Linear mixed model" with the factors "type of surface" and "wetting media" was applied to analyse the effects on fungal adhesion (p < .05). RESULTS SFE and Ra of glazed specimens were significantly higher than corresponding values of polished ones. The wetting media significantly changed the fungal binding (p = .0016). Significantly higher quantities of adhering fungi were found after mucin incubation compared to saliva (p = .004). For the factor "surface" as well as the interaction between "surface" and "wetting media," no statistically significant differences have been found. In mixed suspension, the growth of Candida was completely prevented. CONCLUSIONS Glazed and polished zirconia differs in terms of physicochemical surface properties. These differences appear to be modulated by pellicle coating affecting the biomass of adhered Candida. Mucin seems to be good binding sites for adhesion of C. albicans.
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Affiliation(s)
- Lana Zupancic Cepic
- Department of Prosthodontics, University Clinic of Dentistry, Medical University of Vienna, Vienna, Austria
| | - Gabriella Dvorak
- Department for Conservative Dentistry and Periodontology, University Clinic of Dentistry, Medical University of Vienna, Vienna, Austria
| | - Eva Piehslinger
- Department of Prosthodontics, University Clinic of Dentistry, Medical University of Vienna, Vienna, Austria
| | - Apostolos Georgopoulos
- Core Facility Oral Microbiology and Hygiene, University Clinic of Dentistry, Medical University of Vienna, Vienna, Austria
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Veríssimo AH, Duarte Moura DM, de Oliveira Dal Piva AM, Bottino MA, de Fátima Dantas de Almeida L, da Fonte Porto Carreiro A, de Assunção e Souza RO. Effect of different repair methods on the bond strength of resin composite to CAD/CAM materials and microorganisms adhesion: An in situ study. J Dent 2020; 93:103266. [DOI: 10.1016/j.jdent.2019.103266] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2019] [Revised: 12/06/2019] [Accepted: 12/17/2019] [Indexed: 10/25/2022] Open
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Al Moaleem MM, Porwal A, Al Ahmari NM, Shariff M, Homeida H, Khalid A. Khat Chewing Induces a Floral Shift in Dental Material-Associated Microbiota: A Preliminary Study. Med Sci Monit 2020; 26:e918219. [PMID: 31956260 PMCID: PMC6990665 DOI: 10.12659/msm.918219] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
Background The habit of khat (Catha Edulis Forskal) chewing is widely practiced in the southern regions of Saudi Arabia, Yemen, and East Africa. This social habit has tremendous effects on oral and general health of khat chewers. Khat may affect bacterial species in plaque biofilms on oral rehabilitation materials. This preliminary case-controlled study aimed to assess and compare the effect of khat chewing on bacterial biodiversity between non-khat chewers (NKC) and khat chewers (KC) in oral biofilms on oral rehabilitation materials using polymerase chain reaction (PCR). Material/Methods Fifty participants were organized into 2 equal groups of NKC and KC, each containing 5 subgroups related to filling material type. Some participants had amalgam (A) or composite (C) restorations, while others had feldspathic porcelain (FP), nickel chromium (NC), and zirconia ceramic (ZC) crowns or bridges. Oral biofilm samples were collected from all participants, DNA was extracted, and samples were subjected to PCR. Bacterial species were then identified and counted. PCR products were sequenced to detect similarity. Partial 16S rRNA gene sequences of the current study samples were compared with 16S rRNA gene sequences from GenBank using BLAST on the National Center for Biotechnology Information website. Results The Streptococcus sp. was the most common bacterial species among our participants (40; 80%), followed by Lactobacillus and Veillonella spp., accounting for 12% (6) and 8% (4), respectively. Streptococcus sp. was observed equally among NKC and KC, but Lactobacillus and Veillonella spp. were higher in KC and NKC, respectively. Lactobacillus was associated mainly with prosthetic materials, and Streptococcus was found among all examined dental restorative materials. Conclusions This research concluded that khat chewing significantly affects bacterial biodiversity in oral biofilms in the presence of different restorative and prosthetic dental materials.
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Affiliation(s)
- Mohammed M Al Moaleem
- Prosthetic Dental Science Department, College of Dentistry, Jazan University, Jazan, Saudi Arabia
| | - Amit Porwal
- Prosthetic Dental Science Department, College of Dentistry, Jazan University, Jazan, Saudi Arabia
| | - Nasser M Al Ahmari
- Prosthodontic Department, College of Dentistry, King Khalid University, Abha, Saudi Arabia
| | - Mansoor Shariff
- Prosthodontic Department, College of Dentistry, King Khalid University, Abha, Saudi Arabia
| | - Husham Homeida
- Department of Preventive Dental Sciences, College of Dentistry, Jazan University, Jazan, Saudi Arabia
| | - Asaad Khalid
- Substance Abuse Research Center, Jazan University, Jazan, Saudi Arabia
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Yener SB, Özsoy ÖP. Quantitative analysis of biofilm formation on labial and lingual bracket surfaces. Angle Orthod 2020; 90:100-108. [PMID: 31891540 DOI: 10.2319/110818-803.1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
OBJECTIVES To evaluate and compare the biofilm formation between labial and lingual orthodontic brackets. MATERIALS AND METHODS Twenty patients with a mean age of 24 ± 8.8 who had received labial or lingual orthodontic treatment were enrolled in the study. Biofilm formation on 80 brackets was analyzed quantitatively with the Rutherford backscattering detection method. Five micrographs were obtained per bracket with views from the vestibule/lingual, mesial, distal, gingival, and occlusal aspects. Quantitative analysis was carried out with surface analysis software (ImageJ 1.48). Data were analyzed by Mann-Whitney U and Kruskal-Wallis tests (α = 0.05). RESULTS Total biofilm formation was 41.56% (min 29.43% to max 48.76%) on lingual brackets and 26.52% (min 21.61% to max 32.71%) on labial brackets. Differences between the two groups were found to be significant. No difference was observed in intraoral location. The biofilm accumulation was mostly located on gingival, mesial, and distal surfaces for both groups. CONCLUSIONS The biofilm accumulation on lingual orthodontic therapy was found to be more than labial orthodontic therapy.
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Antibiofilm activities of fluoride releasing restorative materials. BALKAN JOURNAL OF DENTAL MEDICINE 2020. [DOI: 10.2478/bjdm-2020-0022] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Backround/Aim: The purpose of this in vitro study is to evaluate the antibiofilm and antimicrobial activities of 5 different restorative materials that release fluoride. Material and Methods: Five different fluoride releasing restorative materials [Riva Self Cure (SDI, Australia), Riva Light Cure (SDI, Australia), Riva Silver (SDI, Australia), Dyract® XP (DENTSPLY, Germany) and Beautifil II (SHOFU, Japan)] and one composite resin material (Grandio, VOCO, Germany) were selected for this study. A total of 48 specimens (8 of each) were prepared using Teflon molds (4.0 mm-diameter and 2.0 mm-thickness). The antibacterial and antibiofilm activities of the mentioned restorative materials on Streptococcus mutans were evaluated. The data obtained were evaluated by One-Way analysis and Tukey's Test (p<0.05). Results: As a result, no correlation was found in terms of antibacterial and antibiofilm activities of the restorative materials evaluated in the study. While the dental plaque (matrix) accumulation was detected at least on the Grandio resin, the materials with the least cell adhesion were Light Cure and Riva Self Cure since it showed antiadhesive properties for S. mutans. Conclusions: Although the highest antibacterial activity against S. mutans was detected in resin-modified glass ionomers, biofilm matrix (dental plaque) accumulation was mostly detected on these material surface in our study.
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Xie K, Guo Y, Zhao S, Wang L, Wu J, Tan J, Yang Y, Wu W, Jiang W, Hao Y. Partially Melted Ti6Al4V Particles Increase Bacterial Adhesion and Inhibit Osteogenic Activity on 3D-printed Implants: An In Vitro Study. Clin Orthop Relat Res 2019; 477:2772-2782. [PMID: 31764350 PMCID: PMC6907305 DOI: 10.1097/corr.0000000000000954] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/07/2019] [Accepted: 08/14/2019] [Indexed: 01/31/2023]
Abstract
BACKGROUND A porous Ti6Al4V implant that is manufactured using selective laser melting (SLM) has broad potential applications in the field of orthopaedic implants. The pore structure of the SLM porous Ti6Al4V implant allows for cell migration and osteogenic differentiation, which is favorable for bone ingrowth and osseointegration. However, it is unclear whether the pore structure and partially melted Ti6Al4V particles on a SLM porous Ti6Al4V implant will increase bacterial adhesion and, perhaps, the risk of implant-related infection. QUESTIONS/PURPOSES (1) Is there more bacterial adhesion and colonization on SLM porous Ti6Al4V implants than on polished orthopaedic implants? (2) Do partially melted Ti6Al4V particles on SLM porous Ti6Al4V implants reduce human bone mesenchymal stem cells (hBMSCs) adhesion, viability, and activity? METHODS To determine bacterial adhesion and biofilm formation, we incubated five different Ti6Al4V discs (polished, grit-blasted, plasma-sprayed, particle SLM porous, and nonparticle SLM porous discs) with methicillin-resistant Staphylococcus aureus (MRSA) and Escherichia coli. Bacterial coverage on the surface of the five different Ti6Al4V discs were evaluated based on scanning electron microscopy (SEM) images quantitatively. In addition, a spread-plate method was used to quantitatively evaluate the bacterial adhesion on those implants. The biofilm formation was stained with crystal violet and semi-quantitatively determined with a microplate reader. The morphology and adhesion of hBMSCs on the five Ti6Al4V discs were observed with SEM. The cell viability was quantitatively evaluated with a Cell Counting Kit-8 assay. In addition, the osteogenic activity was determined in vitro with a quantitatively alkaline phosphatase activity assay and alizarin-red staining. For semiquantitative analysis, the alizarin-red stained mineralized nodules were dissolved and determined with a microplate reader. RESULTS The polished discs had the lowest MRSA adhesion (8.3% ± 2.6%) compared with grit-blasted (19.1% ± 3.9%; p = 0.006), plasma-sprayed (38.5% ± 5.3%; p < 0.001), particle (23.1% ± 2.8%; p < 0.001), and nonparticle discs (15.7% ± 2.5%; p = 0.003). Additionally, when comparing the two SLM discs, we found that particle discs had higher bacterial coverage than nonparticle discs (23.1% ± 2.8% versus 15.7% ± 2.5%; p = 0.020). An E. coli analysis showed similar results, with the higher adhesion to particle SLM discs than to nonparticle discs (20.7% ± 4.2% versus 14.4% ± 3.6%; p = 0.011). In addition, on particle SLM porous discs, bacterial colonies were localized around the partially melted Ti6Al4V particles, based on SEM images. After a 7-day incubation period, the cell viability in the particle group (optical density value 0.72 ± 0.05) was lower than that in the nonparticle groups (optical density value: 0.87 ± 0.08; p = 0.003). Alkaline phosphatase activity, as a marker of osteogenic differentiation, was lower in the particle group than in the nonparticle group (1.32 ± 0.12 U/mL versus 1.58 ± 0.09 U/mL; p = 0.012). CONCLUSION Higher bacterial adhesion was observed on SLM porous discs than on polished discs. The partially melted Ti6Al4V particles on SLM porous discs not only enhanced bacterial adhesion but also inhibited the osteogenic activity of hBMSCs. Postprocessing treatment is necessary to remove partially melted Ti6Al4V particles on an SLM implant before further use. Additional studies are needed to determine whether an SLM porous Ti6Al4V implant increases the risk of implant-related infection in vivo. CLINICAL RELEVANCE As implants with porous Ti6Al4V made using SLM are being designed, our preliminary findings suggest that postprocessing treatment is needed to remove partially melted Ti6Al4V particles before further use. In addition, the depth of the porous structure of the SLM implant should not exceed the maximum depth of bone ingrowth because the host immune defense cannot prevent bacterial adhesion without integration.
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Affiliation(s)
- Kai Xie
- K. Xie, Y. Guo, S. Zhao, L. Wang, J. Wu, J. Tan, Y. Yang, W. Wu, Y. Hao, Shanghai Key Laboratory of Orthopaedic Implants, Department of Orthopaedic Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China W. Jiang, Y. Hao, Clinical and Translational Research Center for 3D Printing Technology, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
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Kurt A, Cilingir A, Bilmenoglu C, Topcuoglu N, Kulekci G. Effect of different polishing techniques for composite resin materials on surface properties and bacterial biofilm formation. J Dent 2019; 90:103199. [DOI: 10.1016/j.jdent.2019.103199] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2019] [Revised: 09/08/2019] [Accepted: 09/21/2019] [Indexed: 11/28/2022] Open
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Wei CX, Leung WK, Burrow MF. Evaluation ofin vitro Streptococcus mutansandActinomyces naeslundiiattachment and growth on restorative materials surfaces. Aust Dent J 2019; 64:365-375. [DOI: 10.1111/adj.12715] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/25/2019] [Indexed: 11/28/2022]
Affiliation(s)
- CX Wei
- Faculty of Dentistry The University of Hong Kong Hong Kong SAR China
| | - WK Leung
- Faculty of Dentistry The University of Hong Kong Hong Kong SAR China
| | - MF Burrow
- Faculty of Dentistry The University of Hong Kong Hong Kong SAR China
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Barkarmo S, Longhorn D, Leer K, Johansson CB, Stenport V, Franco‐Tabares S, Kuehne SA, Sammons R. Biofilm formation on polyetheretherketone and titanium surfaces. Clin Exp Dent Res 2019; 5:427-437. [PMID: 31452954 PMCID: PMC6704035 DOI: 10.1002/cre2.205] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2019] [Revised: 05/09/2019] [Accepted: 05/14/2019] [Indexed: 11/12/2022] Open
Abstract
Objective Polyetheretherketone (PEEK) is a polymer used in devices in orthopedic and dental rehabilitation. The aim of this in vitro study was to compare biofilm formation by a range of important oral bacterial species on PEEK, blasted PEEK, commercially pure titanium (cp-Ti), and titanium-6 aluminium-4 vanadium (Ti6Al4V). Material and methods Coin-shaped samples were manufactured, and the surfaces were characterized using optical interferometry, scanning electron microscopy, energy-dispersive X-ray spectroscopy, and contact angle measurements. Bacterial species of Streptococcus sanguinis, Streptococcus oralis, Enterococcus faecalis, and Streptococcus gordonii were cultured on the four material surfaces for varying amounts of time. Biofilms were quantified following staining with crystal violet. Results Roughness and contact angle results showed blasted PEEK > PEEK > cp-Ti = Ti6Al4V. There was increased biofilm formation on blasted PEEK by S. sanguinis, S. oralis, and S. gordonii, whereas the bacterial adhesion was similar on PEEK, cp-Ti, and Ti6Al4V. The bacterial growth of E. faecalis was significantly higher on cp-Ti compared with the other three groups. Conclusion The results, taking into consideration the biofilm formation, suggest that PEEK should perform as well as cp-Ti or TiAl6V4 when used as a dental restorative material.
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Affiliation(s)
- Sargon Barkarmo
- Department of Prosthetic Dentistry/Dental Materials ScienceInstitute of Odontology, Sahlgrenska Academy, University of GothenburgGothenburgSweden
| | - Daniel Longhorn
- School of Dentistry, College of Medical and Dental SciencesUniversity of BirminghamBirminghamUK
| | - Kiran Leer
- School of Dentistry, College of Medical and Dental SciencesUniversity of BirminghamBirminghamUK
- Institute of Microbiology and InfectionUniversity of BirminghamBirminghamUK
| | - Carina B. Johansson
- Department of Prosthetic Dentistry/Dental Materials ScienceInstitute of Odontology, Sahlgrenska Academy, University of GothenburgGothenburgSweden
| | - Victoria Stenport
- Department of Prosthetic Dentistry/Dental Materials ScienceInstitute of Odontology, Sahlgrenska Academy, University of GothenburgGothenburgSweden
| | - Sebastian Franco‐Tabares
- Department of Prosthetic Dentistry/Dental Materials ScienceInstitute of Odontology, Sahlgrenska Academy, University of GothenburgGothenburgSweden
| | - Sarah A. Kuehne
- School of Dentistry, College of Medical and Dental SciencesUniversity of BirminghamBirminghamUK
- Institute of Microbiology and InfectionUniversity of BirminghamBirminghamUK
| | - Rachel Sammons
- School of Dentistry, College of Medical and Dental SciencesUniversity of BirminghamBirminghamUK
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Huang B, Cvitkovitch DG, Santerre JP, Finer Y. Biodegradation of resin–dentin interfaces is dependent on the restorative material, mode of adhesion, esterase or MMP inhibition. Dent Mater 2018; 34:1253-1262. [DOI: 10.1016/j.dental.2018.05.008] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2017] [Revised: 04/02/2018] [Accepted: 05/08/2018] [Indexed: 10/16/2022]
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de Paula AB, Taparelli JR, Alonso RCB, Innocentini-Mei LH, Puppin-Rontani RM. Synthesis and application of triclosan methacrylate monomer in resin composites. Clin Oral Investig 2018; 23:965-974. [DOI: 10.1007/s00784-018-2521-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2017] [Accepted: 06/07/2018] [Indexed: 11/28/2022]
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Zhu W, Lao C, Luo S, Liu F, Huang Q, He J, Lin Z. Mechanical and antibacterial properties of benzothiazole-based dental resin materials. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2018; 29:635-645. [PMID: 29343187 DOI: 10.1080/09205063.2018.1429861] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Wenbin Zhu
- College of Materials Science and Engineering, South China University of Technology, Guangzhou, China
| | - Chonghui Lao
- Guangdong Provincial Key Laboratory of Stomatology, Guanghua School of Stomatology, Hospital of Stomatology, Sun Yat-sen University, Guangzhou, China
| | - Shuzhen Luo
- College of Materials Science and Engineering, South China University of Technology, Guangzhou, China
| | - Fang Liu
- College of Materials Science and Engineering, South China University of Technology, Guangzhou, China
| | - Qiting Huang
- Guangdong Provincial Key Laboratory of Stomatology, Guanghua School of Stomatology, Hospital of Stomatology, Sun Yat-sen University, Guangzhou, China
| | - Jingwei He
- College of Materials Science and Engineering, South China University of Technology, Guangzhou, China
| | - Zhengmei Lin
- Guangdong Provincial Key Laboratory of Stomatology, Guanghua School of Stomatology, Hospital of Stomatology, Sun Yat-sen University, Guangzhou, China
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Soft Lithography and Minimally Human Invasive Technique for Rapid Screening of Oral Biofilm Formation on New Microfabricated Dental Material Surfaces. Int J Dent 2018; 2018:4219625. [PMID: 29593793 PMCID: PMC5821979 DOI: 10.1155/2018/4219625] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2017] [Accepted: 11/19/2017] [Indexed: 11/18/2022] Open
Abstract
Introduction Microfabrication offers opportunities to study surface concepts focused to reduce bacterial adhesion on implants using human minimally invasive rapid screening (hMIRS). Wide information is available about cell/biomaterial interactions using eukaryotic and prokaryotic cells on surfaces of dental materials with different topographies, but studies using human being are still limited. Objective To evaluate a synergy of microfabrication and hMIRS to study the bacterial adhesion on micropatterned surfaces for dental materials. Materials and Methods Micropatterned and flat surfaces on biomedical PDMS disks were produced by soft lithography. The hMIRS approach was used to evaluate the total oral bacterial adhesion on PDMS surfaces placed in the oral cavity of five volunteers (the study was approved by the University Ethical Committee). After 24 h, the disks were analyzed using MTT assay and light microscopy. Results In the present pilot study, microwell structures were microfabricated on the PDMS surface via soft lithography with a spacing of 5 µm. Overall, bacterial adhesion did not significantly differ between the flat and micropatterned surfaces. However, individual analysis of two subjects showed greater bacterial adhesion on the micropatterned surfaces than on the flat surfaces. Significance Microfabrication and hMIRS might be implemented to study the cell/biomaterial interactions for dental materials.
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Stanković-Pešić J, Kostić M, Igić M, Đorđević V. Biofilm formation on dental materials. ACTA STOMATOLOGICA NAISSI 2018. [DOI: 10.5937/asn1877821p] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022] Open
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Tu Y, Ling X, Chen Y, Wang Y, Zhou N, Chen H. Effect of S. Mutans and S. Sanguinis on Growth and Adhesion of P. Gingivalis and Their Ability to Adhere to Different Dental Materials. Med Sci Monit 2017; 23:4539-5445. [PMID: 29140971 PMCID: PMC5700666 DOI: 10.12659/msm.904114] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Background Caries and periodontal diseases are caused by the biofilm formed by caries- and periodontal disease-related bacteria. Specific biofilms could be formed on different filling materials in oral cavity. Thus, to explore the inhibition effect of restorative filling materials on biofilm formation is of great significance in the treatment of caries and periodontal disease. Material/Methods The supernatants of S. mutans, S. sanguinis, and P. gingivalis suspension were combined with BHI broth. After 24 h, the live P. gingivalis number was calculated by colony counting and the biofilm was monitored by fluorescence microscopy. To test the adhesive ability of S. mutans and S. sanguinis on different dental materials, the biofilm was formed on different dental materials and then the bacterial number was calculated by using a Spectramax 250 microplate reader at OD 550, and the adhesive ability of S. mutans and S. sanguinis on different dental materials was analyzed by scanning electron microscopy. Results The growth and biofilm formation of P. gingivalis was significantly inhibited by S. mutans and S. sanguinis supernatants (P<0.05). All groups except the zinc phosphate cement group (B) exerted a strong inhibitory effect on the biofilm formation of S. mutans and S. sanguinis (P<0.05). Conclusions The supernatants of S. mutans and S. sanguinis significantly inhibited the growth and biofilm formation of P. gingivalis, and the adhesive ability of S. mutans and S. sanguinis are different on different dental materials. These results provide useful information on dental caries, periodontal disease, and dental materials.
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Affiliation(s)
- Yan Tu
- Department of Conservative Dentistry and Periodontics, Affiliated Hospital of Stomatology, College of Medicine, Zhejiang University, Hangzhou, Zhejiang, China (mainland)
| | - Xiaolong Ling
- Department of Conservative Dentistry and Periodontics, Affiliated Hospital of Stomatology, College of Medicine, Zhejiang University, Hangzhou, Zhejiang, China (mainland)
| | - Yadong Chen
- Department of Conservative Dentistry and Periodontics, Affiliated Hospital of Stomatology, College of Medicine, Zhejiang University, Hangzhou, Zhejiang, China (mainland)
| | - Yuan Wang
- Department of Conservative Dentistry and Periodontics, Affiliated Hospital of Stomatology, College of Medicine, Zhejiang University, Hangzhou, Zhejiang, China (mainland)
| | - Na Zhou
- Department of Conservative Dentistry and Periodontics, Affiliated Hospital of Stomatology, College of Medicine, Zhejiang University, Hangzhou, Zhejiang, China (mainland)
| | - Hui Chen
- Department of Conservative Dentistry and Periodontics, Affiliated Hospital of Stomatology, College of Medicine, Zhejiang University, Hangzhou, Zhejiang, China (mainland)
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Estay J, Martín J, Viera V, Valdivieso J, Bersezio C, Vildosola P, Mjor IA, Andrade MF, Moraes RR, Moncada G, Gordan VV, Fernández E. 12 Years of Repair of Amalgam and Composite Resins: A Clinical Study. Oper Dent 2017; 43:12-21. [PMID: 28976841 DOI: 10.2341/16-313-c] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
OBJECTIVE The objective of this study was to clinically evaluate repaired posterior amalgam and composite restorations over a 12 year period, investigate the influence of repair in the survival of restorations, and compare their behavior with respect to controls. METHODS Thirty-four patients, 18 to 80 years of age with 167 restorations, 67 composite resin (RC), and 100 amalgam (AM) restorations, participated. Restorations with localized, marginal, anatomical deficiencies and/or secondary caries, and "clinically judged" suitable for repair or replacement according to US Public Health Service (USPHS) criteria, were randomly assigned to four groups: repair (n=35, 20 AM, 15 RC), replacement (n=43, 21 AM, 22 RC), positive control (n=71, 49 AM, 22 RC), or negative control (n=18, 10 AM, 8 RC). The quality of the restorations was blind scored according to the modified USPHS criteria. Two examiners scored them at initial status (κ=0.74) and after one to five, 10, and 12 years (κ=0.88). Wilcoxon and Mann-Whitney tests provided for comparisons within the same group and between years, respectively. RESULTS After 12 years, all groups behaved similarly in marginal adaptation, marginal stain, teeth sensitivity, anatomic form, and luster ( p≥0.05). Better behavior in roughness was observed in replaced RC ( p=0.049). CONCLUSIONS Given that most clinical parameters investigated were similar between all groups during the follow-up, the repair of RC and AM restorations is a good clinical option because it is minimally invasive and can consistently increase the longevity of restorations.
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Effect of titanium and zirconia dental implant abutments on a cultivable polymicrobial saliva community. J Prosthet Dent 2017; 118:481-487. [DOI: 10.1016/j.prosdent.2017.01.010] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2016] [Revised: 01/10/2017] [Accepted: 01/10/2017] [Indexed: 12/23/2022]
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Bayrak GD, Sandalli N, Selvi-Kuvvetli S, Topcuoglu N, Kulekci G. Effect of two different polishing systems on fluoride release, surface roughness and bacterial adhesion of newly developed restorative materials. J ESTHET RESTOR DENT 2017; 29:424-434. [DOI: 10.1111/jerd.12313] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2017] [Revised: 05/09/2017] [Accepted: 05/16/2017] [Indexed: 11/28/2022]
Affiliation(s)
- Gokcen Deniz Bayrak
- Department of Pediatric Dentistry; Yeditepe University, Faculty of Dentistry; Istanbul Turkey
| | - Nuket Sandalli
- Department of Pediatric Dentistry; Kemerburgaz University, Faculty of Dentistry; Istanbul Turkey
| | - Senem Selvi-Kuvvetli
- Department of Pediatric Dentistry; Yeditepe University, Faculty of Dentistry; Istanbul Turkey
| | - Nursen Topcuoglu
- Department of Oral Microbiology, Faculty of Dentistry; Istanbul University; Istanbul Turkey
| | - Guven Kulekci
- Department of Oral Microbiology, Faculty of Dentistry; Istanbul University; Istanbul Turkey
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Hahnel S, Ionescu AC, Cazzaniga G, Ottobelli M, Brambilla E. Biofilm formation and release of fluoride from dental restorative materials in relation to their surface properties. J Dent 2017; 60:14-24. [DOI: 10.1016/j.jdent.2017.02.005] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2016] [Revised: 02/06/2017] [Accepted: 02/11/2017] [Indexed: 11/16/2022] Open
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Gutiérrez MF, Malaquias P, Hass V, Matos TP, Lourenço L, Reis A, Loguercio AD, Farago PV. The role of copper nanoparticles in an etch-and-rinse adhesive on antimicrobial activity, mechanical properties and the durability of resin-dentine interfaces. J Dent 2017; 61:12-20. [PMID: 28438559 DOI: 10.1016/j.jdent.2017.04.007] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2016] [Revised: 04/14/2017] [Accepted: 04/18/2017] [Indexed: 11/16/2022] Open
Abstract
OBJECTIVES To evaluate the effect of addition of copper nanoparticles at different concentrations into an etch-and-rinse adhesive (ER) on antimicrobial activity, Knoop microhardness (KHN), in vitro and in situ degree of conversion (DC), as well as the immediate (IM) and 2-year (2Y) resin-dentine bond strength (μTBS) and nanoleakage (NL). METHODS Seven experimental ER adhesives were formulated according to the amount of copper nanoparticles incorporated into the adhesives (0 [control], 0.0075 to 1wt.%). We tested the antimicrobial activity of adhesives against Streptococcus mutans using agar diffusion assay after IM and 2Y. The Knoop microhardness and in vitro DC were tested after IM and 2Y. The adhesives were applied to flat occlusal dentine surfaces after acid etching. After resin build-ups, specimens were longitudinally sectioned to obtain beam-like resin-dentine specimens (0.8mm2), which were used for evaluation of μTBS and nanoleakage at the IM and 2Y periods. In situ DC was evaluated at the IM period in these beam-like specimens. Data were submitted to appropriate statistical analyses (α=0.05). RESULTS The addition of copper nanoparticles provided antimicrobial activity to the adhesives only in the IM evaluation and slightly reduced the KHN, the in vitro and in situ DC (copper concentrations of 1wt.%). However, KHN increase for all concentrations after 2Y. After 2Y, no significant reductions of μTBS (0.06 to 1% wt.%) and increases of nanoleakage were observed for copper containing adhesives compared to the control group. CONCLUSION Copper nanoparticles addition up to 0.5wt.% may provide antimicrobial properties to ER adhesives and prevent the degradation of the adhesive interface, without reducing the mechanical properties of the formulations.
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Affiliation(s)
- Mario F Gutiérrez
- School of Dentistry, State University of Ponta Grossa, Ponta Grossa, PR, Brazil; Institute for Research of Dental Sciences, Faculty of Dentistry, University of Chile, Santiago, Chile
| | - Pamela Malaquias
- School of Dentistry, State University of Ponta Grossa, Ponta Grossa, PR, Brazil
| | - Viviane Hass
- Undergraduate and Post-Graduate Department, University CEUMA, São Luís, MA, Brazil; Post-Graduate Department, State University of West Paraná, Cascavel, PR, Brazil
| | - Thalita P Matos
- School of Dentistry, State University of Ponta Grossa, Ponta Grossa, PR, Brazil
| | - Lucas Lourenço
- School of Dentistry, State University of Ponta Grossa, Ponta Grossa, PR, Brazil
| | - Alessandra Reis
- Department of Restorative Dentistry, State University of Ponta Grossa, Ponta Grossa, PR, Brazil
| | - Alessandro D Loguercio
- Department of Restorative Dentistry, State University of Ponta Grossa, Ponta Grossa, PR, Brazil.
| | - Paulo Vitor Farago
- Department of Pharmaceutical Sciences, State University of Ponta Grossa, Ponta Grossa, PR, Brazil
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Lin NJ. Biofilm over teeth and restorations: What do we need to know? Dent Mater 2017; 33:667-680. [PMID: 28372810 DOI: 10.1016/j.dental.2017.03.003] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2017] [Accepted: 03/09/2017] [Indexed: 12/29/2022]
Abstract
OBJECTIVE The goal of this manuscript is to provide an overview of biofilm attributes and measurement approaches in the context of studying biofilms on tooth and dental material surfaces to improve oral health. METHODS A historical perspective and terminology are presented, followed by a general description of the complexity of oral biofilms. Then, an approach to grouping measurable biofilm properties is presented and considered in relation to biofilm-material interactions and material design strategies to alter biofilms. Finally, the need for measurement assurance in biofilm and biofilm-materials research is discussed. RESULTS Biofilms are highly heterogeneous communities that are challenging to quantify. Their characteristics can be broadly categorized into constituents (identity), quantity, structure, and function. These attributes can be measured over time and in response to substrates and external stimuli. Selecting the biofilm attribute(s) of interest and appropriate measurement methods will depend on the application and, in the case of antimicrobial therapies, the strategic approach and expected mechanism of action. To provide measurement assurance, community accepted protocols and guidelines for minimum data and metadata should be established and broadly applied. Consensus standards may help to streamline testing and demonstration of product claims. SIGNIFICANCE Understanding oral biofilms and their interactions with tooth and dental material surfaces holds great promise for enabling improvements in oral and overall human health. Both substrate and biofilm properties should be considered to develop a more thorough understanding of the system.
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Affiliation(s)
- Nancy J Lin
- Biosystems and Biomaterials Division, National Institute of Standards and Technology, 100 Bureau Drive, Gaithersburg, MD 20899-8543, USA.
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Gutiérrez M, Malaquias P, Matos T, Szesz A, Souza S, Bermudez J, Reis A, Loguercio A, Farago P. Mechanical and microbiological properties and drug release modeling of an etch-and-rinse adhesive containing copper nanoparticles. Dent Mater 2017; 33:309-320. [DOI: 10.1016/j.dental.2016.12.011] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2016] [Revised: 12/15/2016] [Accepted: 12/16/2016] [Indexed: 11/16/2022]
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Heimer S, Schmidlin PR, Roos M, Stawarczyk B. Surface properties of polyetheretherketone after different laboratory and chairside polishing protocols. J Prosthet Dent 2017; 117:419-425. [DOI: 10.1016/j.prosdent.2016.06.016] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2015] [Revised: 06/15/2016] [Accepted: 06/16/2016] [Indexed: 10/20/2022]
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Ali S, Sangi L, Kumar N. Exploring antibacterial activity and hydrolytic stability of resin dental composite restorative materials containing chitosan. Technol Health Care 2017; 25:11-18. [DOI: 10.3233/thc-161238] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
- Shahid Ali
- Medical Research Centre, Liaquat University of Medical & Health Sciences, Jamshoro, Pakistan
| | - Laila Sangi
- Department of Operative Dentistry, Liaquat University of Medical & Health Sciences, Jamshoro, Pakistan
| | - Naresh Kumar
- Department of Science of Dental Materials, Liaquat University of Medical & Health Sciences, Jamshoro, Pakistan
- Department of Restorative Dental Sciences, College of Dentistry, King Faisal University, Al Ahsa, Kingdom of Saudi Arabia
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Nozaki K, Koizumi H, Horiuchi N, Nakamura M, Okura T, Yamashita K, Nagai A. Suppression effects of dental glass-ceramics with polarization-induced highly dense surface charges against bacterial adhesion. Dent Mater J 2017; 34:671-8. [PMID: 26438991 DOI: 10.4012/dmj.2014-342] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
This study investigated the surface characteristics and antibacterial ability capacity of surface-improved dental glass-ceramics by an electrical polarization process. Commercially available dental glass-ceramic materials were electrically polarized to induce surface charges in a direct current field by heating. The surface morphology, chemical composition, crystal structure, and surface free energy (SFE) were evaluated using scanning electron microscopy, energy dispersive X-ray spectrometry, X-ray diffraction, and water droplet methods, respectively. The antibacterial capacity was assessed by a bacterial adhesion test using Streptococcus mutans. Although the surface morphology, chemical composition, and crystal structure were not affected by electrical polarization, the polar component and total SFE were enhanced. After 24 h incubation at 37ºC, bacterial adhesion to the polarized samples was inhibited. The electrical polarization method may confer antibacterial properties on prosthetic devices, such as porcelain fused to metal crowns or all ceramic restorations, without any additional bactericidal agents.
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Affiliation(s)
- Kosuke Nozaki
- Department of Material Biofunctions, Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University
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